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author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-07-07 01:32:02 (GMT) |
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committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-07-07 23:25:10 (GMT) |
commit | 961d9120fa6f078492a1c762dd91f2c097e56c83 (patch) | |
tree | e11955d14d0f777ad5a76b44034f6b3c5281a0bf /drivers/pci/pci.h | |
parent | 3737b2b1046900660b42e25c904b85e78139d25b (diff) | |
download | linux-961d9120fa6f078492a1c762dd91f2c097e56c83.tar.xz |
PCI: Introduce platform_pci_power_manageable function
Introduce function pointer platform_pci_power_manageable to be used
by the platform-related code to point to a function allowing us to
check if given device is power manageable by the platform.
Introduce acpi_pci_power_manageable() playing that role for ACPI.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci.h')
-rw-r--r-- | drivers/pci/pci.h | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index e0eff35..0cd2e71 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -5,10 +5,28 @@ extern int pci_create_sysfs_dev_files(struct pci_dev *pdev); extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev); extern void pci_cleanup_rom(struct pci_dev *dev); -/* Firmware callbacks */ -extern pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev); -extern int (*platform_pci_set_power_state)(struct pci_dev *dev, - pci_power_t state); +/** + * Firmware PM callbacks + * + * @is_manageable - returns 'true' if given device is power manageable by the + * platform firmware + * + * @set_state - invokes the platform firmware to set the device's power state + * + * @choose_state - returns PCI power state of given device preferred by the + * platform; to be used during system-wide transitions from a + * sleeping state to the working state and vice versa + * + * If given platform is generally capable of power managing PCI devices, all of + * these callbacks are mandatory. + */ +struct pci_platform_pm_ops { + bool (*is_manageable)(struct pci_dev *dev); + int (*set_state)(struct pci_dev *dev, pci_power_t state); + pci_power_t (*choose_state)(struct pci_dev *dev); +}; + +extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); |